/*
 * This file is part of buteo-syncfw package
 *
 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 *               2019 Updated to use bluez5 by deloptes@gmail.com
 *
 * Contact: Sateesh Kavuri <sateesh.kavuri@nokia.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#ifndef TRANSPORTTRACKER_H_
#define TRANSPORTTRACKER_H_

#include "SyncCommonDefs.h"
#include <QObject>
#include <QMap>
#include <QMutex>
#include <QDBusVariant>
#include <QDBusConnection>

#ifdef HAVE_BLUEZ_5
#include <BtCommon.h>
#endif

namespace Buteo {

class USBModedProxy;
class NetworkManager;

/*! \brief Class for tracking transport states
 *
 * USB state is tracked with HAL, BT with Context Framework and Internet states with Buteo::NetworkManager.
 */
class TransportTracker : public QObject
{
    Q_OBJECT

public:
    /*! \brief Constructor
     *
     * @param aParent Parent object
     */
    TransportTracker(QObject *aParent = 0);

    //! \brief Destructor
    virtual ~TransportTracker();

    /*! \brief Checks the state of the given connectivity type
     *
     * @param aType Connectivity type
     * @return True if available, false if not
     */
    bool isConnectivityAvailable(Sync::ConnectivityType aType) const;

signals:
    /*! \brief Signal emitted when a connectivity state changes
     *
     * @param aType Connectivity type whose state has changed
     * @param aState New state. True if available, false if not.
     */
    void connectivityStateChanged(Sync::ConnectivityType aType, bool aState);

    /*! \brief Signal emitted when a n/w state changes
     *
     * @param aState New state. True if available, false if not.
     * @param aType Connection type. The type of connetcion with the Internet.
     */
    void networkStateChanged(bool aState, Sync::InternetConnectionType aType);

    /*! \brief Signal emitted when a network session is successfully opened
     */
    void sessionConnected();

    /*! \brief Signal emitted when opening a network session fails
     */
    void sessionError();

private slots:
    void onUsbStateChanged(bool aConnected);

#ifdef HAVE_BLUEZ_5
    void onBtStateChanged(const QString &interface, const QVariantMap &changed, const QStringList &invalidated);
    void onBtInterfacesAdded(const QDBusObjectPath &path, const InterfacesMap &interfaces);
    void onBtInterfacesRemoved(const QDBusObjectPath &path, const QStringList &interfaces);
#endif

    void onInternetStateChanged(bool aConnected, Sync::InternetConnectionType aType);

private:
    QMap<Sync::ConnectivityType, bool> iTransportStates;

    USBModedProxy *iUSBProxy;

    NetworkManager *iInternet;
    QDBusConnection iSystemBus;
    QString iDefaultBtAdapter;

    mutable QMutex iMutex;

    /*! \brief updates the state of the given connectivity type to input value
     *
     * @param aType Connectivity type
     * @param aState Connectivity State
     */
    void updateState(Sync::ConnectivityType aType, bool aState);

#ifdef SYNCFW_UNIT_TESTS
    friend class TransportTrackerTest;
    friend class SynchronizerTest;
#endif

#ifdef HAVE_BLUEZ_5
    bool btConnectivityStatus();
#endif
};

} // namespace Buteo

#endif /* TRANSPORTTRACKER_H_ */
